.NET Document Editor API to Edit PDF, Word & More

PM > Install-Package GroupDocs.Editor

// Input document and password
const string filename = "NET_Framework-protected.pdf";
const string password = "password";
string inputPath = System.IO.Path.Combine(Common.TestHelper.PdfFolder, filename);

//1. Create a load options class with a password
GroupDocs.Editor.Options.PdfLoadOptions loadOptions = new PdfLoadOptions();
loadOptions.Password = password;

//2. Create edit options and adjust if necessary
GroupDocs.Editor.Options.PdfEditOptions editOptions = new PdfEditOptions();
editOptions.EnablePagination = true; //enable pagination for per-page processing in WYSIWYG-editor
editOptions.Pages = PageRange.FromStartPageTillEnd(3); //Edit pages from the 3rd page till the end

//3. Create an Editor instance and load a document
GroupDocs.Editor.Editor editor = new Editor(inputPath, delegate () { return loadOptions; });

//4. Edit a document and generate an EditableDocument
GroupDocs.Editor.EditableDocument originalDoc = editor.Edit(editOptions);

//5. Generate HTML/CSS, send it to WYSIWYG, edit there, and obtain edited version
string originalContent = originalDoc.GetEmbeddedHtml();
string editedContent = originalContent.Replace(".NET Framework", "I love Java!!!");

//6. Generate EditableDocument from edited content
EditableDocument editedDoc = EditableDocument.FromMarkup(editedContent, null);

//7. Create and adjust save options
GroupDocs.Editor.Options.PdfSaveOptions saveOptions = new PdfSaveOptions();
saveOptions.Compliance = PdfCompliance.Pdf20;

//8. Save to a file or a stream
string outputPath = System.IO.Path.Combine(Common.TestHelper.OutputFolder, filename);
editor.Save(editedDoc, outputPath, saveOptions);

//9. Dispose all resources
originalDoc.Dispose();
editedDoc.Dispose();
editor.Dispose();

// Edit Word documents in .NET 
using (FileStream fs = File.OpenRead("filepath/document.docx"))
{   // Load the input Word document
    Options.WordProcessingLoadOptions loadOptions = new WordProcessingLoadOptions();
    loadOptions.Password = "password-if-any";
    // Edit the document
    using (Editor editor = new Editor(delegate { return fs; }, delegate { return loadOptions; }))
    {
        Options.WordProcessingEditOptions editOptions = new WordProcessingEditOptions();
        editOptions.FontExtraction = FontExtractionOptions.ExtractEmbeddedWithoutSystem;
        editOptions.EnableLanguageInformation = true;
        editOptions.EnablePagination = true;

        using (EditableDocument beforeEdit = editor.Edit(editOptions))
        {
            string originalContent = beforeEdit.GetContent();
            List allResources = beforeEdit.AllResources;

            string editedContent = originalContent.Replace("document", "edited document");
            // Save the edited Word document
            using (EditableDocument afterEdit = EditableDocument.FromMarkup(editedContent, allResources))
            {
                WordProcessingFormats docxFormat = WordProcessingFormats.Docx;
                Options.WordProcessingSaveOptions saveOptions = new WordProcessingSaveOptions(docxFormat);
                            
                saveOptions.EnablePagination = true;
                saveOptions.Locale = System.Globalization.CultureInfo.GetCultureInfo("en-US");
                saveOptions.OptimizeMemoryUsage = true;
                saveOptions.Password = "password";
                saveOptions.Protection = new WordProcessingProtection(WordProcessingProtectionType.ReadOnly, "write_password");

                using (FileStream outputStream = File.Create("filepath/editedDocument.docx"))
                {
                    editor.Save(afterEdit, outputStream, saveOptions);
                }
            }
        }
    }
}